Description: DSI uses two types of light sources: ambient light and directional light.
Ambient light comes from all directions and illuminates objects regardless of their position or orientation with the same intensity.
Directional light comes from a specific direction. It flows uniformly and maintains a consistent intensity. It has a directional vector that determines the face on which an object receives light.
The MOVE LIGHT SOURCE command positions a directional vector at two points that are perpendicular to an object. The right and left arrow keys move the light source in the positive and negative X-direction, while the up and down arrow keys move the light source in the positive and negative Y-direction.